Environmentally-friendly shoe material production method

Abstract

An environmentally-friendly shoe material production method, comprising: recycling TPEE scraps generated in the processing process; cutting the recycled TPEE scraps into blocky particles, wherein the blocky particles have a length of 2 cm-3 cm, a width of 1 cm-2 cm, and a height of 1 cm-2 cm; and filling a shoe material cavity of a steam forming mold with the blocky particles, and introducing steam into the shoe material cavity to directly perform hot forming on the blocky particles obtained by cutting, so as to obtain a shoe material. The advantage of the method is that TPEE scraps generated in the practical production process can be recycled, reducing the waste of resources and pollution to the environment.

Description

A method for producing environmentally friendly shoe materials Technical Field

[0001] The present invention relates to the technical field of shoe materials, and in particular to a method for producing environmentally friendly shoe materials. Background Art

[0002] In recent years, supercritical foaming materials and their technologies have been very popular in the market, especially the supercritical foaming of elastomers, which has very broad application prospects in the field of sports shoes because of its advantages such as high rebound, low density and good molding processability.

[0003] TPEE (thermoplastic polyester elastomer) is a common material used in popcorn shoe production. When TPEE sheets are processed into products like soles, TPEE scraps are inevitably produced. Because these scraps have already been foamed and formed, and their particles are significantly larger than those of the original TPEE popcorn material, existing technology currently prevents their direct recycling. Consequently, the current practice is to simply discard these scraps, which is not only wasteful but also environmentally polluting. In light of these issues, the inventors of this case conducted in-depth research, leading to this case. Technical issues

[0004] The technical problem to be solved by the present invention is to provide an environmentally friendly shoe material production method that can directly utilize TPEE scraps to produce shoe materials, thereby avoiding waste of resources and reducing pollution to the environment, and having good environmental protection properties. Technical Solutions

[0005] The present invention is achieved by: a method for producing environmentally friendly shoe materials, the production method comprising:

[0006] Recycle TPEE scraps generated during the processing;

[0007] Cut the recycled TPEE scraps into block particles with a length of 2 cm to 3 cm, a width of 1 cm to 2 cm, and a height of 1 cm to 2 cm;

[0008] The cut block particles are heated and formed using a steam forming mold to obtain shoe materials.

[0009] Furthermore, when the steam forming mold heats and forms the block particles, the steam forming pressure is 1.97 MPA-2.03 MPA.

[0010] Furthermore, when the steam forming mold heats and forms the block particles, the temperature of the steam is 195°C-255°C.

[0011] Furthermore, when the steam forming mold heats and forms the block particles, the steam heating time is 430S-530S.

[0012] Furthermore, the shoe material is a sole, an insole or a sheet. Beneficial effects

[0013] By adopting the technical solution of the present invention, at least the following beneficial effects are achieved:

[0014] 1. By cutting the recycled TPEE scraps into block particles of specific specifications, filling the block particles into the shoe material cavity of the steam forming mold, and introducing steam into the shoe material cavity of the steam forming mold to directly heat and shape the TPEE scraps, the TPEE scraps generated in the actual production process do not need to be discarded, which not only avoids the waste of resources, but also reduces the pollution to the environment, and is environmentally friendly.

[0015] 2. By setting the length of the block particles to 2cm-3cm, the width to 1cm-2cm, and the height to 1cm-2cm, the formed shoe material is easier to cool, which helps to reduce production time and improve production efficiency. In addition, there will be no holes in the shoe material after forming, the relative density of the shoe material is moderate, and the shoe material will not be too hard, which can ensure the quality of the formed shoe material.

[0016] 3. 100% TPEE scraps can be directly used to produce shoe materials, and the performance of the produced shoe materials can be close to the level of original TPEE. The quality of the shoe materials after molding can be guaranteed. The molding process mainly controls the parameters of steam to make adjacent TPEE scraps reliably bond together without the use of adhesives such as AB glue, which can not only reduce the waste of adhesives, but also be more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] FIG1 is a perspective view of a steam forming mold according to the present invention;

[0019] FIG2 is a schematic diagram of the principle of the steam forming mold of the present invention;

[0020] FIG3 is a schematic structural diagram of the shoe material after molding according to the present invention;

[0021] FIG4 is a flowchart of an execution flow of an environmentally friendly shoe material production method according to the present invention.

[0022] Description of reference numerals:

[0023] Steam forming mold 100, upper mold 101, lower mold 102, shoe material cavity 103;

[0024] Shoe materials 200. Best Mode for Carrying Out the Invention

[0025] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] 1 to 4 , the present invention provides an environmentally friendly shoe material production method, the production method comprising:

[0027] Step S1, recycling the TPEE scraps generated during the processing; since TPEE scraps are generated when the TPEE-molded sheets are processed into products such as soles, in order to reuse the TPEE scraps and avoid pollution caused by the TPEE scraps, the TPEE scraps generated during the processing need to be recycled.

[0028] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2 cm to 3 cm, a width of 1 cm to 2 cm, and a height of 1 cm to 2 cm.

[0029] Since the present invention cuts the TPEE scraps into block particles and then uses a steam forming mold 100 to directly hot-press the block particles into shoe materials 200, very high requirements are placed on the specifications of the block particles. This is because if the size of the block particles is too large, the block particles will expand during molding in the steam forming mold 100, resulting in the molded shoe material 200 not being easy to cool, which will prolong the entire production time and the molded shoe material may have holes; and if the size of the block particles is too small, the block particles will not have a good supporting effect in the steam forming mold 100, and the relative density of the molded shoe material 200 will be relatively high, which will cause the molded shoe material to be relatively hard. To this end, in step S2 of the present invention, the length of the block particles is 2cm-3cm, the width is 1cm-2cm, and the height is 1cm-2cm. By using block particles of the above specifications, the molded shoe material is easier to cool, which helps to reduce production time and improve production efficiency. The molded shoe material will not have holes, the relative density of the shoe material is moderate, and the shoe material will not be too hard, which can ensure the quality of the molded shoe material.

[0030] Step S3: Using a steam forming mold to heat and form the cut block particles to obtain shoe materials. Step S3 is specifically as follows:

[0031] The cut block particles are filled into the shoe material cavity 103 of the steam forming mold 100, the steam forming mold 100 is controlled to close, and steam is directly introduced into the shoe material cavity 103 of the steam forming mold 100 to heat the shoe material, so that the block particles in the shoe material cavity 103 are bonded together to form a shoe material, wherein the shoe material 200 is a sole, an insole, or a sheet material. In a specific implementation of the present invention, before the cut block particles are filled into the shoe material cavity 103 of the steam forming mold 100, the cut block particles are weighed according to the required weight of the shoe material, and the weighed block particles are then filled into the shoe material cavity 103 of the steam forming mold to ensure that the shoe material after forming is neither too light nor too heavy.

[0032] In order to directly recycle TPEE scraps, the present invention proposes for the first time to fill the recycled TPEE scraps into the shoe material cavity 103 of the steam forming mold 100, and directly use steam to heat and form them; in order to directly steam-heat the TPEE scraps, the present invention has strict requirements on the steam forming pressure, steam temperature and steam heating time; if the steam forming pressure is too high, the block particles will melt, and if the steam forming pressure is too low, the bonding effect between the block particles will be relatively poor; if the steam temperature is too high, the block particles will melt, and if the steam temperature is too low, the bonding effect between the block particles will be relatively poor; if the steam heating time is too long, steam will be wasted and it will be unfavorable to improve production efficiency, and if the steam heating time is too short, the bonding effect between the block particles will be relatively poor. To this end, in the present invention, when the steam forming mold 100 heats and forms the block particles, the steam forming pressure is 1.97MPA-2.03MPA, the steam temperature is 195℃-255℃, and the steam heating time is 430S-530S. By adopting the above-mentioned steam parameters, it can be ensured that the block particles will not melt, and the block particles can be reliably bonded together, ensuring that the formed shoe material 200 will not break during use, so that the performance of the produced shoe material can be close to the level of native TPEE; preferably, when the steam forming mold 100 heats and forms the block particles, the steam forming pressure is 2.00MPA, the steam heating time is 480S, and the steam temperature is 225℃.

[0033] The steam forming mold 100 includes an upper mold 101 and a lower mold 102. When the molds are closed, a shoe material cavity 103 is formed between the upper mold 101 and the lower mold 102; the cavity wall of the shoe material cavity 103 is evenly distributed with air holes (not shown in the figure), and each of the air holes is connected to a steam generating device (not shown in the figure) through an air pipe, so that when working, the steam generating device can directly introduce steam into the shoe material cavity 103, thereby achieving heating and forming of the block particles filled in the shoe material cavity 103; in the specific implementation of the present invention, the cavity wall of the shoe material cavity is covered with air holes, and each air hole is evenly distributed on the cavity wall of the shoe material cavity, which can ensure that each position of the shoe material cavity 103 is heated evenly, so that the block particles in the shoe material cavity 103 are evenly heated, and ensure that adjacent block particles can be reliably bonded together.

[0034] When the present invention is specifically implemented, it also includes step S4, after the shoe material 200 is formed, the steam is turned off, and the formed shoe material 200 is cooled, and the cooling time is 240S-320S. During the specific cooling process, if the cooling time is too short, the block particles will expand and the shaping effect will be poor; and if the cooling time is too long, the production time will be extended, which is not conducive to improving production efficiency. The present invention sets the cooling time to 240S-320S, which can ensure that the block particles after forming will not expand and cause poor shaping effect, and also help to improve production efficiency. In addition, when cooling the formed shoe material 200, after turning off the steam, cooling water can be introduced into the shoe material cavity 103 of the steam forming mold 100 for cooling and shaping.

[0035] By adopting the above technical solution of the present invention, at least the following beneficial effects are achieved:

[0036] 1. By cutting the recycled TPEE scraps into block particles of specific specifications, filling the block particles into the shoe material cavity of the steam forming mold, and introducing steam into the shoe material cavity of the steam forming mold to directly heat and shape the TPEE scraps, the TPEE scraps generated in the actual production process do not need to be discarded, which not only avoids the waste of resources, but also reduces the pollution to the environment, and is environmentally friendly.

[0037] 2. By setting the length of the block particles to 2cm-3cm, the width to 1cm-2cm, and the height to 1cm-2cm, the formed shoe material is easier to cool, which helps to reduce production time and improve production efficiency. In addition, there will be no holes in the shoe material after forming, the relative density of the shoe material is moderate, and the shoe material will not be too hard, which can ensure the quality of the formed shoe material.

[0038] 3. 100% TPEE scraps can be directly used to produce shoe materials, and the performance of the produced shoe materials can be close to the level of original TPEE. The quality of the shoe materials after molding can be guaranteed. The molding process mainly controls the parameters of steam to make adjacent TPEE scraps reliably bond together without the use of adhesives such as AB glue, which can not only reduce the waste of adhesives, but also be more environmentally friendly.

[0039] The technical solution of the present invention is further described in detail below with reference to specific embodiments: Example 1

[0040] A method for producing an environmentally friendly shoe material, comprising:

[0041] Step S1: Recycling TPEE scraps generated during the processing.

[0042] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2 cm, a width of 1 cm, and a height of 1 cm.

[0043] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 1.97 MPa, the steam temperature is 195° C., and the steam heating time is 430 seconds.

[0044] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 240 seconds. Example 2

[0045] A method for producing environmentally friendly shoe materials, comprising:

[0046] Step S1: Recycling TPEE scraps generated during the processing.

[0047] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 3 cm, a width of 2 cm, and a height of 2 cm.

[0048] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.03 MPa, the steam temperature is 255° C., and the steam heating time is 530 seconds.

[0049] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 320 seconds. Example 3

[0050] A method for producing environmentally friendly shoe materials, comprising:

[0051] Step S1: Recycling TPEE scraps generated during the processing.

[0052] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.5 cm, a width of 1.5 cm, and a height of 1.5 cm.

[0053] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.00 MPa, the steam temperature is 225° C., and the steam heating time is 480 seconds.

[0054] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds. Example 4

[0055] A method for producing environmentally friendly shoe materials, comprising:

[0056] Step S1: Recycling TPEE scraps generated during the processing.

[0057] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.5 cm, a width of 1.5 cm, and a height of 1.5 cm.

[0058] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.01 MPa, the steam temperature is 225° C., and the steam heating time is 480 seconds.

[0059] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds. Example 5

[0060] A method for producing environmentally friendly shoe materials, comprising:

[0061] Step S1: Recycling TPEE scraps generated during the processing.

[0062] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.5 cm, a width of 1.5 cm, and a height of 1.5 cm.

[0063] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 1.99 MPa, the steam temperature is 225° C., and the steam heating time is 480 seconds.

[0064] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds. Example 6

[0065] A method for producing environmentally friendly shoe materials, comprising:

[0066] Step S1: Recycling TPEE scraps generated during the processing.

[0067] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.5 cm, a width of 1.5 cm, and a height of 1.5 cm.

[0068] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.00 MPa, the steam temperature is 250° C., and the steam heating time is 480 seconds.

[0069] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds. Example 7

[0070] A method for producing environmentally friendly shoe materials, comprising:

[0071] Step S1: Recycling TPEE scraps generated during the processing.

[0072] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.5 cm, a width of 1.5 cm, and a height of 1.5 cm.

[0073] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.00 MPa, the steam temperature is 210° C., and the steam heating time is 480 seconds.

[0074] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds. Example 8

[0075] A method for producing environmentally friendly shoe materials, comprising:

[0076] Step S1: Recycling TPEE scraps generated during the processing.

[0077] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.5 cm, a width of 1.5 cm, and a height of 1.5 cm.

[0078] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.00 MPa, the steam temperature is 225° C., and the steam heating time is 510 seconds.

[0079] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds. Example 9

[0080] A method for producing environmentally friendly shoe materials, comprising:

[0081] Step S1: Recycling TPEE scraps generated during the processing.

[0082] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.5 cm, a width of 1.5 cm, and a height of 1.5 cm.

[0083] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.00 MPa, the steam temperature is 225° C., and the steam heating time is 450 seconds.

[0084] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds. Example 10

[0085] A method for producing environmentally friendly shoe materials, comprising:

[0086] Step S1: Recycling TPEE scraps generated during the processing.

[0087] Step S2: Cut the recycled TPEE scraps into block particles, wherein the block particles have a length of 2.8 cm, a width of 1.7 cm, and a height of 1.8 cm.

[0088] Step S3: Fill the cut block particles into the shoe material cavity of the steam forming mold, control the steam forming mold to close the mold, and directly introduce steam into the shoe material cavity of the steam forming mold for heating, so that the block particles in the shoe material cavity are bonded together to form the shoe material; when the steam forming mold heats and forms the block particles, the steam forming pressure is 2.00 MPa, the steam temperature is 225° C., and the steam heating time is 480 seconds.

[0089] Step S4: After the shoe material is formed, the steam is turned off and the formed shoe material is cooled for 280 seconds.

[0090] After actual experimental testing, the specific performance indicators of the above embodiments 1-9 are as follows:

[0091]

[0092] The table above demonstrates that the footwear materials produced using 100% TPEE scraps meet the specified performance requirements for TPEE footwear materials in terms of hardness, density, yellowing resistance, rebound, shrinkage, compression, trouser tearing, and delamination tearing. Furthermore, the table also shows that the size of the pellets cut from TPEE scraps affects the hardness and density of the shoe material. When the pellet size decreases, the hardness and density of the shoe material increase; when the pellet size increases, the hardness and density of the shoe material decrease.

[0093] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for producing environmentally friendly shoe materials, characterized in that: The production method comprises: Recycle the TPEE scraps generated during the processing; Cutting the recycled TPEE scraps into block particles, wherein the block particles have a length of 2 cm-3 cm, a width of 1 cm-2 cm, and a height of 1 cm-2 cm; The cut block particles are heated and formed using a steam forming mold to obtain shoe materials.

2. The method for producing an environmentally friendly shoe material according to claim 1, characterized in that: When the steam forming mold heats and forms the block particles, the steam forming pressure is 1.97 MPA-2.03 MPA.

3. The method for producing an environmentally friendly shoe material according to claim 1, characterized in that: When the steam forming mold is used to heat and form the block particles, the temperature of the steam is 195°C-255°C.

4. The environmentally friendly shoe material production method according to claim 1, characterized in that: When the steam forming mold heats and forms the block particles, the steam heating time is 430S-530S.

5. The method for producing an environmentally friendly shoe material according to claim 1, characterized in that: The shoe material is a sole, an insole or a sheet material.

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